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Definition: Mini USB
The small USB socket found on digital cameras, external hard drives, USB hubs and other equipment. Mini USB is much smaller than USB Type A and B but twice as thick as Micro USB (see illustration below). Mini USB and all other USB connectors are expected to be superseded by USB Type C. See Micro USB, USB Type C, USB 3.0 and USB.
Mini-B Is Widely Used
Sockets on a Hub
Digital cameras typically have a Mini-B USB socket for the Mini-B/Type-A cable that plugs into the computer or hub.
This Belkin hub, which plugs into a wall outlet for power, is connected to the computer by a Mini-B/Type A cable. It provides four Type A ports for peripherals but adds only three because one Type A port on the computer is used to connect the hub.